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Conversion of measures of length ppt-grade 3
- 1. Review ā¢ What deviceis used to measure time? ā¢ What is 9 years in months? ā¢ What is 4 hours in minutes? ā¢ What is 120 minutes in seconds? ā¢ What is 1 year in days?
- 2. APRIL 16, 2024,TUESDAY Lesson 4.2 Measures of Length Objectives: ā¢ Measure objects according to appropriate unit of linear measure. ā¢ Convert common units of length from larger to smaller unit and vice versa.
- 3. Measures of Length Referencebook pages: 345 - 353
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- 5. ā¢ Length ishow long something is. ā¢ We use different devices to measure lengths such as the ruler, meter stick and tape measure. ā¢ Meter(m) is the standard unit of length in the metric system. ā¢ We use units related to meter for shorter lengths, namely millimeter (mm), centimeter (cm), and decimeter (dm). ā¢ We use kilometer(km) for long distances.
- 6. How will I knowwhich unit of length is appropriate to use?
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- 16. Conversion Facts (Length) ā¢ 1 km = 1000m ā¢ 1 m = 1 000mm ā¢ 1 m = 100 cm ā¢ 1 m =10 dm ā¢ 1 dm = 10 cm ā¢ 1 cm = 10 mm
- 17. Convert length measuresusing operations We can change one unit of length measurement to another. ā¢ Bigger unit to smaller unit, multiply ā¢ Smaller unit to bigger unit, divide
- 18. Example 1 Convert: 6 kmto meters Solution: 6 x 1 000 = 6 000 Answer: 6 km = 6 000 meters Conversion fact: 1 km = 1000 m
- 19. Example 2 Convert: 8 mto centimeters Solution: 8 x 100 = 800 Answer: 8 m = 800 centimeters Conversion fact: 1 m = 100 cm
- 20. Example 3 Convert: 3 000m to kilometer Solution: 3000 Ć· 1000 = 3 Answer: 3 000 m = 3 kilometers Conversion fact: 1 km = 1000 m
- 21. Example 4 Convert: 9 000mm to meter Solution: 9000 Ć· 1000 = 9 Answer: 9 000 mm = 9 meters Conversion fact: 1 m = 1000 mm
- 22. Textbook Practice Practice onp. 351 ā¢ Practice conversion. ā¢ Write the missing number.